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UPS battery backup

Minutes: ride through a flicker, or shut down cleanly.

Portable power stations

Hours: a charged battery, with no fuel to store.

Portable generators

Days: as long as the fuel lasts, always outdoors.

Guide 28 · Generator

Is Your Gas Meter Big Enough for a Natural Gas Standby Generator?

Maybe, and only your gas utility can confirm it. Your meter has to supply the generator at full load while your furnace, water heater, range, and dryer run at the same time. Add up those demands, compare them with the meter's rating, and call the utility before you buy.

Updated Drafted and checked with AIFact-checked by the HoldBackup editorial team How this guide was made

On this page
  1. Why the meter matters
  2. How to add up your gas demand
  3. Checking the meter and pressure
  4. Piping from the meter to the generator
  5. Matching the generator to your electrical load
  6. Placement and safety
  7. Sources

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The verdict

Buy a home standby generator whose natural gas fuel consumption at full load, added to every other gas appliance in your home, stays within what your utility says your meter and service pressure can deliver.

See the store link

What we check

  • Generator fuel use at full load on natural gas
  • Total input rating of all your gas appliances
  • Meter capacity confirmed by your gas utility
  • Required inlet gas pressure versus your service pressure
  • Pipe size and run length from meter to generator
  • Natural gas running and starting output ratings
Portable inverter generator: rounded suitcase body on stub feet with a top carry handle, a fuel cap, and a front control panel with a dial, two outlets and a lit indicator

Drawing of backup power equipment.

Store link Generator

Champion Power Equipment 100837 14kW Home Standby Generator System, 200-Amp aXis Automatic Transfer Switch

One listing to compare. Check its specs against the list above before you buy.

PriceAmazon sets it, and it changes. The button takes you to today's price.

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The unit named above, on Amazon.

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Generator safety: carbon monoxide and backfeed

Carbon monoxide: never run a generator indoors, in a garage, basement or crawlspace, or near windows, doors or vents. Using a generator indoors can kill you in minutes. Use battery-powered carbon monoxide alarms in the home. CPSC Safety Alert 5123

Backfeed: never plug a generator into a wall outlet or a dryer outlet. That is extremely dangerous: it can energize utility lines and injure line workers and people in the home. Use a transfer switch or interlock installed by a licensed electrician. CPSC Safety Alert 5123 (PDF)

Why the meter matters

A standby generator is one of the largest gas loads a home can have. When the power is out, it may run for hours at the same time as your furnace, water heater, and range. Your meter, service regulator, and piping all have to keep up with that combined demand.

If they cannot, gas pressure drops under load. The generator may struggle to hold its output, and other appliances may run poorly. That is why the meter question comes before the generator purchase, not after.

How to add up your gas demand

Start with the generator. Find its natural gas fuel consumption at full load on the spec sheet or in the manual. Use the full-load figure, not a half-load or average figure, because the system has to handle the worst case.

Next, find the input rating of every gas appliance. It is printed on the rating plate, usually inside an access panel or on the back. Write down each one in the same units the generator uses.

For example, if your furnace, water heater, range, and dryer plates add up to one total and the generator's full-load figure is another, the sum of the two is what you ask your utility about. Do not assume some appliances will be off. In a winter outage, the furnace and water heater may both be running.

  • Generator: full-load natural gas consumption from the spec sheet
  • Furnace or boiler: input rating from the rating plate
  • Water heater: input rating from the rating plate
  • Range, dryer, fireplace, pool heater, grill line: each rating plate

Checking the meter and pressure

Your meter's nameplate may show a rated capacity, but do not rely on reading it yourself. Call your gas utility, give it your total, and ask whether your existing meter and service pressure can supply it. Ask what an upgrade involves if they cannot.

Also check the generator manual for its required inlet gas pressure, usually given as a range. Ask the utility what pressure your home receives. Some homes need a meter or regulator change before a standby unit will run properly. Utilities often handle meter upgrades on their own schedule, so ask early.

Piping from the meter to the generator

Even with a large enough meter, the gas line to the generator must be sized for its demand. Longer runs and more fittings need larger pipe. A licensed gas fitter sizes the line using local code tables and your generator's requirements.

In many cases the existing house line cannot simply be tapped. The fitter may run a dedicated line from the meter. Expect a permit and an inspection in most areas.

Matching the generator to your electrical load

Natural gas sizing and electrical sizing go together. Many standby generators list different output on natural gas than on propane, so check the natural gas rating, not just the headline number in a listing name. Look for separate running and starting ratings.

If you are considering the Champion 100837 home standby system, the listing on this page, read its spec sheet for natural gas output and full-load fuel consumption, then take both numbers to your utility and installer. Connecting any standby generator to house wiring requires transfer equipment installed by a licensed electrician, who decides the complete connection.

  • Natural gas running output
  • Natural gas starting output
  • Full-load fuel consumption on natural gas
  • Required inlet gas pressure range
  • Clearance requirements from windows, doors, and vents

Placement and safety

Standby generators run outdoors only. Never run any generator indoors, in a garage, or near windows, doors, or vents, because exhaust carries carbon monoxide. Follow the maker's clearance rules and local code when choosing the pad location, and keep working carbon monoxide alarms inside your home.

Sources

Recorded AI check: Oct 9, 2026. The sources below may include later additions. AI checks compare factual numbers and checkable claims with web sources; they do not verify every statement.

Best inverter generator for a home outage compares units from the makers' numbers. Every guide in this class is in Portable generators.

How this guide was made

  1. Drafted and checked with AI. An AI model wrote the draft from the guide's topic. A second AI pass looked for factual numbers to check against web sources. This does not verify every statement. A draft that fails the check is held for review.
  2. Fact-checked by the HoldBackup editorial team. On , a person on the HoldBackup editorial team reviewed this guide against its sources. That is a review of the writing, not a test of any unit.
  3. General guidance only. No prices, rankings, or test results, because we have none to back them. Check any number against the maker's own spec sheet.
  4. No lab tests, and we say so. HoldBackup has not run any unit named here.
  5. The store link is not a pick for this guide. It goes to a unit in this product class that this guide does not review. Check it against the list above before you buy.
  6. Labelled store links. A store button goes straight to Amazon with HoldBackup's affiliate tag. HoldBackup counts the click. A live button carries a "paid link" label, and the disclosure sits above the first one on every guide.

Questions

Can I tell my meter size just by looking at it?

The nameplate may list a rated capacity, but only your gas utility can confirm what your meter and service pressure can actually deliver. Call them with your total demand before you buy.

What if my meter is too small?

Ask your gas utility about a meter or regulator upgrade. Many utilities do this, sometimes with a wait. You can also look at a smaller generator with lower fuel use, or a propane setup, if an upgrade is not possible.

Do I need to count appliances that rarely run?

Yes. Count every gas appliance at its rated input. During an outage, you cannot control what cycles on, and the utility and gas fitter will size for the full connected load.

Who installs the gas line and the electrical connection?

A licensed gas fitter or plumber sizes and runs the gas line. A licensed electrician installs the transfer equipment and makes the electrical connection. Most areas require permits and inspections for both.

Where does the price button go?

Straight to Amazon. Amazon sets the price and availability, and both can change.

More guides

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    How to Size a Whole-House Standby Generator

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    How to Size a Portable Generator for Your House

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